5. maintenance-the act of keeping something in good order/condition by regularly checking it e.g.: You may be able to afford a/ second hand automobile, but its maintenance may cost you a lot TSs.质量控制工具的养是会很昂贵的。 The maintenance of quality-control instruments can be very costly.5. maintenance—the act of keeping something in good order/condition by regularly checking it. e.g.: You may be able to afford a second￾hand automobile, but its maintenance may cost you a lot. Trs.: 质量控制工具的保养是会很昂贵的。 The maintenance of quality-control instruments can be very costly